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(Model.) 2 Sheets-Sheet L I'. HAsD-'BNTEUPEL LOCKING LATCH.

No. 284,081. Patented 8888.121882.

i (Model.) 2 Sheets-Sheet 2 .F.HASDBNTEUFBL.

LOCKING LATCH.

No. 264,081. Patented Sept. 12, `1882.

www@ 6' V//w gwn@ NiTED STATES PATENT OEETCE.

FRIEDRICH HASDENTEUFEL, OF ISERLOHN, PRUSSIA, GERMANY.

LOCKING-LATCH.

SPECIFICATION forming part of Letters Patent No. 264,081, dated September 12, 1882.

Application led December 16, 1880.

(Model.) Patented in France March 20,1879, No. 129,699; in Germany April 10, 1879, No.

8,159, and September 16, 1880, No. 13,474; in Belgium November 13, 1880, No. 53.026; in Italy November 19, 1880l XXIV, 438; in Spain December 31, 1880, No. 1,217, and in England August 8, 1881, No. 3,426.

To all 'whom' it may concern:

Be it known that I, FRIEDRICH HAsDEN- TEUFEL, of Iserlohn, Prussia, Germany, have invented a new and useful Improvement in Locks, of which the following is a specification.

My invention relates more particularly to springless locks, and has for its piincipal feature a lockingring turned by the key around an annular guide concentric to the keyhole.

The accompanying drawings represent two typical forms of locks, Figure 1 being an inside View of amortise-lock when open; Fig. 2, the same when closed; and Fig. 3, a section through the key-hole, while Fig. 4 is an inside View of a cabinet-lock when open; Fig. 5, the same when closed. Figs. 6y and 7 show the shape of the key.

B, Figs. 1 to 3, is the latch or day-bolt, fitted loosely between the two lock-plates P P, and guided in a straight line by two stamps, b b, which slide in horizontal slots s s of the lockplates. It is moved by the lever L, which has its i'ulcrum at the hub l, provided with a pris matic aperture for introducing the correspondingly-shaped shank ofthe doorhandle,by which the lever L is turned.

In order to shoot the day-bolt or latch B automatically when the door is closed without the application of springs, the vtop end of the lever L is rounded and made to support a balance-lever, L', which has its fulcrum at Z', and

` rests on the rounded head of the lever L with its projection Z2, while the extremity Z3 supports a counter-weight, W. The latter is guided vertically by lateral stumps, which slide in vertical slots s2 s3 of the lock-plates. The weight of the balance-lever L and counter-weight W, pressing on the top of the actuating-lever L, causes-the latter to` move forward, thereby counteracting the weight of the door-handle.

For securing the lock by means of the key, the lookin g-rin g It is provided, which forms the principal feature ot' my invention. This ring is concentric to the key-hole and turns loosely on the guide-ring G, which has the same depth between the lock-plates as the ring R, and is riveted to the lock-plate. A projection, r, is cast on the inside of the ring B, said projection being thinner than the body of the ring and passing over a recess, g, cut out in the guide-ring G. This recess has the same depth as the projection r, and is sufficiently long to permit the necessary motion of thering R.

the bottom plates or key-hole littings H., which are attached to the lock-plates. The ring R has a narrow portion, r2, and a wide portion, r3, which tit into the circular curve formed at the lower extremity ot' the lever L.

The function of the key and locking-ring R is as follows: As long as the narrow portion of the ring R is turned upward the lever L, and therefore thelatch B, can be moved forward and backward by the door-handle and the counter-weight W. For locking the latch B in its closed position, the wide part ot' the ring B. is turned upward by turning the key against the projection r until the latter is arrested by its contact with the high portion of theguidering G. In this position ofthe ring R the latter fits into the lower extremity ofthe lever L, thereby preventing, any further motion ofthe lever L and the latch or day bolt B.

In the cabinet-lock, Figs. lland 5,the lockingrng R servesto move theslidingr holt B. The projection r, guide-ring G, and bottom plates, H, have the same purpose as in Figs. l to 3. The bolt B is guided between two pins, g2 g3., and has at the backa stud, b3, which projects into a slot, r4, of the ring B. The ends of this slot are curved concentrically to the guide-rin g G, and the ring R is enlarged on one side in such a 4manner that the weight of the ring rests on the stud b3 when' the lock is closed and when it is open, thereby securingV the bolt in itsextremepositions. rIheboltisfurtherguided by a pin projecting into a horizontal slot in the lock-plate.

A night-bolt, I, may be alsous'ed for securing the boltin its extreme position. The wide portion of the rotary bolt I lits into a recess, n, on the bolt, and prevents the latter from go- 2 'atacan in g backward until the night-bolt has been turned out of its way. A stop-pin, S, serves to limit the motion of the night-bolt.

Itis evident that the shape and arrangement of the different part-s and other details of con struction may be varied in many ways without departing from the nature of my invention, and that the locks shown in the drawings represent only two typical forms. For instance, instead of a slot anda stndfas in Figs. aand 5, other known devices may be used for converting the rotary motion of the ring R in a sliding motion of the bolt. The ring R may act on a bolt, as in Figs. 4and 5, and at the same time serve to lock the latch of the door, as in Figs. 1 to 3. Ihe night-bolt I may also be applied to other moving parts of the lock, so as to preventtheirmotion,instead ofactingon the bolt. The sliding bolt may be dispensed with altogether and the ring It itself turned into a rotary bolt by making it project through the front plate of the lock. The balance-lever, instead of pressing on the top ofthe operatinglever L, may act directly on a latch or bolt, B.

I am aware ofthe Letters PatentNo. 235,137, dated the 7th of December, 1880; and I do not claim any part of the invention described or claimed in the specification of said patent.

1. The combination of a movable lockingring, R, fitted loosely between the lock-plates and provided on its inside with a projection, r,

serving as a point of application for the keybit, with a fixed annular guide, G, situated inside the locking-ring and recessed ou a portion of its circumference to give room for the rotary motion of the projection r and limit the motion ofthe latter, substantially as described.

2. The combination of a movable lockingring, It, having a narrow portion, r2, anda Wide portion, r3, fitted loosely between the lockplates, and provided on its inside with a projection, i', serving as a point of application for the key-bit, Witlia fixed annular guide, G, situated inside the locking-ring, and recessed on a portion of its circumference to give room for the rotary motion of the projection i" and limit the motion of the latter, and a lever fitting' with a part of its circumference over the wide portion r3 of the locking-ring, whereby the latter can be made to lock the lever in a fixed position, substantially as described.

3. The combination of an operating-lever, L, turned by the door-handle, with a latch, B, a balance-lever uniformly loaded by a verticallymovable counter-weighavW, a locking-ring, R, and circular guide G, substantially as described.

This specification signed by me this 4th day of March, 1880.

FRIEDRICH HASDENTEUFEL.

Witnesses:

O'r'ro AUER,

LUDWIG EENS. 

